Cita APA (7th ed.)

Schmid, T., & Testa, C. (1969). Systems building: An international survey of methods. Frederick A. Praeger.

Cita Chicago (17th ed.)

Schmid, Thomas, i Carlo Testa. Systems Building: An International Survey of Methods. Nueva York: Frederick A. Praeger, 1969.

Cita MLA (9th ed.)

Schmid, Thomas, i Carlo Testa. Systems Building: An International Survey of Methods. Frederick A. Praeger, 1969.